Rack εστίαση του παιδιού κοιτάζοντας καύση σκόνη - Πλάνα & Βίντεο Αρχείου

Hyperlapse of kid looking at burning orange powder

A medical scientist in a lab studies malaria

CDC Center for Disease Control scientist work in strains of viral meningitis in the lab

CDC scientist in appropriate personal protective equipment isolates and tests for highly pathogenic avian influenza

Hyperlapse of kid looking at burning orange powder

Selective focus of african american scientist in glasses looking at blood sample in flask

Cropped view of scientist taking blood sample on glass

Cropped view of scientist setting up microscope

Close up view of african american scientist in glasses using microscope

Selective focus of african american scientist in glasses using microscope with sunlight on background